NABL Accredited · NDT Service
Polyethylene Coating Test on Metal
(PE Coating Quality — ISO 21809)
Testing of polyethylene and polypropylene coating quality on steel pipes — verifying coating thickness, adhesion, holiday detection, peel strength and cathodic disbondment resistance per ISO 21809.
ISO 21809
Standard
±0.1mm
Accuracy
5 Days
Report TAT
NABL
Accredited
NABL Accredited Lab · ISO/IEC 17025:2017
Digital Reports via Autovity QLMS
Pan-India · 7 Lab Locations
Est. 2009 · 20,000+ Projects
Overview
What is the Polyethylene Coating Test on Metal?
Polyethylene (PE) Coating on Metal provides corrosion protection for buried steel pipelines and structural sections. Three-layer PE (3LPE) coatings consist of fusion-bonded epoxy primer, adhesive copolymer and polyethylene topcoat. Quality testing verifies the coating system will provide the specified service life.
At Global Lab, PE coating testing per ISO 21809 covers coating thickness, holiday detection at 25kV, peel strength at 23°C and 50°C, cathodic disbondment and impact resistance — providing complete coating quality certification for pipeline coating acceptance.
3LPE Full Test Suite
Thickness, holiday, peel strength, impact, cathodic disbondment all tested.
Holiday Detection at 25kV
Spark tester detects all pinholes and coating discontinuities.
Peel Strength at 23°C & 50°C
Adhesion tested at ambient and elevated temperature per ISO 21809.
Cathodic Disbondment Test
Coating disbondment under cathodic protection current measured.
NABL Certified Reports
All results on NABL-accredited letterhead per ISO 21809.
All Pipe Diameters
Testing on pipes from 100mm to 1200mm diameter.
Test in Action
Polyethylene Coating Test on Metal — Site Images
Spark Tester Holiday Detection on PE Coated Pipe
Peel Strength Test at 90° Pull
Cathodic Disbondment Test Setup
Test Procedure
How the Polyethylene Coating Test on Metal is Conducted
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1Coating ThicknessMagnetic induction gauge measures 3LPE total thickness at multiple points.
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2Holiday Detection25kV spark tester passed over full pipe surface. Holidays located and counted.
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3Peel Strength Test25mm wide strips of PE coating peeled at 90° at 23°C and 50°C.
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4Impact ResistanceStandard weight dropped on coated pipe. Holiday detection after impact.
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5Cathodic DisbondmentCoated specimen in NaCl solution under −1.5V for 48 hours. Disbondment radius measured. NABL report within 5 days.
Standards & Specifications
Applicable Test Standards
| Standard | Title | Scope | Type |
|---|---|---|---|
| ISO 21809 | Petroleum and Natural Gas Industries — External Coatings for Buried or Submerged Pipelines | PE Coating | ISO |
| AWWA C215 | Extruded Polyolefin Coatings for the Exterior of Steel Water Pipelines | Water Pipeline Coating | AWWA |
| DIN 30670 | Polyethylene Coatings of Steel Pipes and Fittings | PE Coating Standard | German Standard |
| IS 13620 | Fusion Bonded Epoxy Coated Reinforcing Bars | FBE Reference | Indian Standard |
Applications
Where is the CAPO Test Used?
Oil and gas buried pipeline PE coating acceptance testing
Water supply and sewage pipeline PE coating quality verification
Structural steel PE/PP coating for marine and offshore applications
District heating pipeline polyurethane and PE coating testing
PE-coated pile casings and sheet piles acceptance testing
Factory coating quality audit for pipeline coating applicators
Why Choose Global Lab
Our Advantages
NABL Accredited ReportsLegally valid ISO 21809 coating certificates for pipeline acceptance.
Complete 3LPE Test SuiteAll coating quality parameters in one comprehensive NABL report.
Pipeline Industry ExperienceExtensive PE coating testing for oil, gas and water pipeline projects.
Pan-India CoverageTesting at all 7 NABL lab locations.
Fast 5-Day ReportComplete ISO 21809 test suite within 5 working days.
Factory Audit ServiceOn-site coating applicator factory audit and batch testing available.